Malicious PDF — malware analysis report

Static analysis result for SHA-256 42846859384c952c…

MALICIOUS

PDF

39.4 KB Created: 2021-05-17 16:39:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 12b1f84f105a2a45512a409c64eab00c SHA-1: 4adbde04fa971012b409df830bbb954c72446d68 SHA-256: 42846859384c952caa6a35b35f6cd0ea2ee29b63a0e58df2fff5f2fd70c649a0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free Robux Real 2021' and game hacks, directing users to a malicious URL. This is a common social engineering tactic to trick users into visiting potentially harmful sites. The embedded URL is identified as a malicious redirector, indicating a high likelihood of further malicious activity.

Machine Learning

  • Nyx PDF Classifier clean score 0.0289

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/free-robux-real-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000032de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32DE 25284 bytes
SHA-256: fc28ec3c457cfb1440a6c4c7f8bceb6666b2d1b159790e907e0f5c6115ea524a
font_01_sfnt_off00006d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D35 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000076e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E7 18720 bytes
SHA-256: a03d25a6fa0cc118f86b8100faabbd8a2e80035a992cccb98ee09d3278d79c98

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